The brass for Weatherby Unprimed Rifle Brass - 20/box cases includes CNC-machined primer pockets and meets strict grade specifications. Considered high quality and a popular choice among game hunters it is important for the cases to be sized deburred and chamfered before reloading since the mouth may not be perfectly round associated with the manufacturing process or perhaps shipping process.Sometimes annealing a process during manufacturing consisting of quick heating to a specified temperature and then fast cooling causes a slight stain near the neck. However the process ensures expand and contract flexibility and a secure hold on the bullet.